How serious is CVE-2026-1229?

This vulnerability has a CVSS score of 2.9 out of 10, classified as LOW severity. Proof-of-concept exploit code is publicly available, making this an active threat.

Is there exploit code available for CVE-2026-1229?

Yes, proof-of-concept exploit code for CVE-2026-1229 is publicly available on GitHub and security research platforms. This increases the risk of active exploitation.

Which products are affected by CVE-2026-1229?

CVE-2026-1229 affects cloudflare circl. Check the full CVE details for specific version information.

How do I fix CVE-2026-1229?

To remediate CVE-2026-1229, check for security patches from cloudflare. Apply all available updates and security patches. If no patch is available, implement recommended workarounds or security controls to mitigate the risk.

CVE-2026-1229

Low

|2.9

Exploit Available

Plain English Summary

AI-powered analysis for quick understanding

This vulnerability allows an attacker to exploit a flaw in the CombinedMult function of Cloudflare's CIRCL library, potentially leading to incorrect calculations with certain inputs. However, it primarily affects specific mathematical operations and does not impact key exchange or signing processes, making it less critical for most users.

Technical Description

The CombinedMult function in the CIRCL ecc/p384 package (secp384r1 curve) produces an incorrect value for specific inputs. The issue is fixed by using complete addition formulas. ECDH and ECDSA signing relying on this curve are not affected. The bug was fixed in v1.6.3 https://github.com/cloudflare/circl/releases/tag/v1.6.3 .

CVSS Vector Analysis

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

Confidentiality ImpactHigh

Integrity ImpactHigh

Availability ImpactHigh

ScopeChanged

Vector String

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:N/AU:Y/R:X/V:X/RE:X/U:Amber

Exploit Resources

Search for proof-of-concept code and exploit modules

GitHub Search Exploit-DB Nuclei Templates Metasploit Vulners

Official References

NIST NVD

Est. Bounty

$395($100-$500)

Vendor Response

Grade APatched in 6 days

Quick Information

Published

Feb 24, 2026

about 1 month ago

Last Modified

Mar 3, 2026

about 1 month ago

Vendor

cloudflare

Product

circl